I can't determine if you need a shelf dedicated to misfit action figures or to make a 'grab bag' of broken toys to sell on the interwebs to some collector who needs the parts that you have available.

Personally, I'm in the market for a 'support beam' for Dracula's castle (The Van Helsing one) b/c the front-middle is all droopy the way it's built. I'm thinking I may skip over to a Home Depot-style place and find a nice 1/4" dowel that I paint a v. dark metallic grey and prop it up. Silly Dracula - must've spent all of his funding on the big lightning collectors for makin' his bebes.